†family Mixopteridae Caster and Kjellesvig-Waering 1955 (eurypterid)
Parent taxon: Carcinosomatoidea according to J. C. Lamsdell 2025
See also Dunlop et al. 2013 and Størmer 1955
Sister taxa: Carcinosomatidae, Lanarkopteridae, Megalograptidae
Subtaxa: Mixopterus
Ecology: nektobenthic carnivore
Distribution:
• Silurian of China (1 collection), Estonia (1), Norway (5), the United Kingdom (1), United States (5: New York)
Total: 13 collections each including a single occurrence